The 29-year-old actress is due to welcome her first child into the world with her fiancé Romain Dauriac, 31, in August, and although film bosses were ''excited'' for her they needed to ''move'' things ''shedule-wise''.

Marvel Studios boss Kevin Feige admitted they want to hide the blonde beauty's bump so viewers would ''never know'' Black Widow, also known as Natasha Romanoff, was pregnant when they shoot scenes for the upcoming movie.

Feige told Collider.com: ''Well my first reaction was I was very happy for her and very excited for her. My second reaction was we've got to move some pieces on the chess board around schedule-wise. But we didn't change the script at all, which is sort of the most important things for us in terms of the storyline. I think the goal is for us to sit here talking about the fact that you would never know that Black Widow was pregnant during the filming of the movie when you see the final version of 'Avengers 2'.''